Rolling window-lock.



G. A. GRAY.

ROLLING WINDOW LOCK.

APPLIOA'IION'IILED 2113.24, 1908.

Patented Dec. 8,1908.

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1 5 is secured the locking UNITED STATES GEORGE A. GRAY, OF WINTHROP, MASSACHUSETTS, ASSIGNOR TO EWEN A.

PATENT OFFICE.

CLARK, OF

WINTHROP, MASSACHUSETTS.

ROLLING WINDOW-LOCK.

Specification of Letters Patent.

Patented Dec. 8, 1908.

To all whom it may concern:

Be it known that I, GEORGE A. GRAY, a citizen of the United States, and a resident of VVint-hrop, in the county of Suffolk and Commonwealth of Massachusetts, have invented certain new and useful Improvements in Rolling Window-Locks, of which the following is a full, clear, and exact description.

This invention has for its object the construction of a look by means of which the two sashes of a window can'be secured together at any point of their relative movement, in a manner to be certain against any outside manipulation. This and other improvements are accomplished by the construction hereinafter disclosed.

Referring to the drawings forming part of this specification, Figure 1 is a side sectional elevation of a window lock made in accordance with the simplest form of my invention. Fig. 2 is an end elevation of the same. Fig. 3 is a face view of the rack-bar used in connection with the'device. Fig. 4 is a side sectional elevation of my device as further improved, and Fig. 5 is a similar elevation of the same still further improved.

In the construction of my invention illustrated in Fig. 1, as well as in all the other forms thereof, a rack bar 1 is permanently fastened to the side bar of the upper sash of a window, as 2, in any suitable manner, as by spurs 3 formed at the ends of the rack and driven into the wood of the sash. This rack bar may be produced by stamping it from thick sheet metal or fiat bar, by punching out the rectangular openings 4.- as shown in Fig. 8, or in any other suitable way.

Upon the upper surface of the lower sash member cooperating with said rack bar, an consisting essentially of a toothed pinion 6 meshing with said rack, a dog 7 for engaging said pinion, a holding case for said parts, and means for retaining said dog in engagement with said pinion. When said dog is out of engagement with the pinion 6, the latter revolves freely in said rack bar as the sashes are moved one relative to the other. The sashes having been adjusted to provide the desired opening, either at the top or bottom of the window, they are locked together by simply pulling forward the finger-piece 8 of said dog until the tooth 9 of the latter enters a space between certain teeth of the pinion; after which the said pinion is locked against I further rotation, and the sashes against further relative movement. A small leaf spring 10 is provided for insuring against the accidental dislodgment of the dog from the pinion, and also to prevent the dog from engaging the pinion when free movement of the window sashes is desired. The holdingcase for said parts is preferably formed by bending a suitable length of sheet metal into two reverse Ls, 11, indicated in Fig. 2; the screws for securing the same to the sash being inserted through the feet 12 thereof. Of course a slot 13 is provided for the passage of the finger-piece 8, while a strip 14 is inserted and suitably fixed in position, both for closing the opening between the two casesections 11, and forterminally supporting the leaf spring 10.

In the construction set forth in Fig. 4:, the only difference over the above-described device consists in the addition of the locking lever 15 pivotally supported at 16 and joined to the dog 7 by a link 17 The pivot 18 by which said link is held to said locking lever, being adapted to come above the level of the pivot 16 when the dog has been swung into engagement with the pinion 6, it is impossiblefor any back pressure applied by the pinion to said dog to separate the two. A further improvement for which this arrange ment is designed comprises the tightening device shown in Fig. 5. This tightening device is designed for clamping the two sashes tightly together when they are closed, and consists of the plate 20 formed with a notch 21 at one end for engaging a finger 22 rigid with the upper sash 2. The opposite end of said plate is held by the pin 24 carried by the locking lever 15 in such a manner that when said lever is moved to throw the dog into engagement with the pinion, said hook or notch pulls the finger 22 strongly forward, and the upper sash with it into firm contact with the lower sash. This serves both to keep the sashes from rattling, and in addition closes them against such separation as would give space for the introduction of some lock-picking instrument.

Ordinarily, the projecting notched or hooked end of the plate 20 is not in the way, but when the windows are washed it is customary to lower the upper sash to substantially the bottom of the window-space, and elevate the lower sash to the top. Should this be done, said projecting end would interfere with the passage of the top-bar of the upper sash. To provide for this contingency, the plate 20 is formed with an L- shaped slot for the reception of the pin 24; such slot 25 permitting the plate to be withdrawn far enough to remove its hooked end from the possibility of such interference. Ordinarily, the said pin would remain in the vertical part of said slot, and act as though it were in a simple fitted hole, but by applying the fingers to the head 26 of the plate and giving both an upward and an outward pull thereto, such plate can be easily removed from danger.

A further improvement consists in the addition of an automatically sounded bell 30 rigidly supported by the case 11, and provided with a spring-clapper 31 a depressed part of which comes into the path of the pinion-teeth and so causes the bell to be rung whenever the window-sashes are given a relative motion.

What I claim as my invention and for which I desire Letters Patent is as follows, to wit 1. The combination with the two sashes of a window, of a rack fixed to one of said sashes, a finger rigid with the same, a locking device for engaging said rack, a pivoted 2. The combination with the two sashes of a window, of a rack fixed to one of said sashes, a finger rigid with the same, a locking device for engaging said rack, a pivoted locking lever for actuating said locking device, a pin projecting from said lever, and a plate having a notch for engaging said finger, an L-shaped slot engaging said pin, and an operating-head for the plate.

3. The combination with the two sashes of a window, of a rack fixed to one of said sashes, a pinion meshing with said rack, a case fixed to the upper surface of the lower sash and pivotally supporting said pinion within it, and a locking lever for said pinion pivoted within said case and having its tail rising vertically above said case.

In testimony that I claim the foregoing invention, I have hereunto set my hand this 20th day of February, 1908.

GEORGE A. GRAY.

Witnesses A. B. UPHAM, WARREN N. AKERS. 

